thumbnail for XCF files

[frederic chaume]

Hi Kai

I checked in the layer view , the flag Fx is unset for each layer (and 
in any case , not able to set it), unless this can be configurede 
somewhere else
and "Better compression" seems also unset

Regards
Frederic


Le 11/11/2025 à 17:35, leoutation at gmx.fr a écrit :
> On 11/10/25 12:45 PM, kaizubg at gmail.com wrote:
>> Hi,
>>
>> This has been on my list of wanted, but not requested, digiKam 
>> feature list quite some time.
>>
>> Tested with a recent 8.9.0 appimage on Fredora 43 . The thumbnail and 
>> the preview of the XCF file are visible on digiKam correctly.
>>
> Hi
> Correctly with "non destructive editing", did you test it?
> See report about three XCF issues and their causes:
> KImageformats doesn't display some XCF files created with Gimp 3
> https://bugs.kde.org/show_bug.cgi?id=491795
>
>> Thanks!
>>
>> Kai
>>
>>
>>
>>
>> ma, 2025-11-10 kello 10:20 +0100, Gilles Caulier kirjoitti:
>>> Hi,
>>>
>>> The XCF thumbnailer comes from the KDE kimageformat codecs collection.
>>> The KDE framework used in 8.8.0 is not the last stable version
>>> published. Thttps://invent.kde.org/frameworks/kimageformats/-/ 
>>> issueshis <https://invent.kde.org/frameworks/kimageformats/-/issueshis>
>>> can explain the dysfunction if this one is now fixed in the last
>>> version of code.
>>>
>>> I plan to update the KDE framework for the digiKam 8.9.0.
>>>
>>> XCF code history :
>>> https://invent.kde.org/frameworks/kimageformats/-/commits/master/src/ 
>>> imageformats/xcf.cpp?ref_type=heads <https://invent.kde.org/ 
>>> frameworks/kimageformats/-/commits/master/src/imageformats/xcf.cpp? 
>>> ref_type=heads>
>>> KDE framework used in 8.8.0 : 6.17.0 (2025-08-08)
>>> Current KDE framework version : 6.19.0 (2025-10-16)
>>>
>>> To report this problem (if it's not yet fixed), please create an
>>> UPSTREAM bug in this repository:
>>>
>>> https://invent.kde.org/frameworks/kimageformats/-/issues <https:// 
>>> invent.kde.org/frameworks/kimageformats/-/issues>
>>>
>>> Best regards
>>>
>>> Le lun. 10 nov. 2025 à 09:45, frederic chaume
>>> <frederic.chaume at gmail.com <mailto:frederic.chaume at gmail.com>> a 
>>> écrit :
>>>>
>>>> Hi all
>>>>
>>>> I'm using Gimp 3.0 to create pictures, and until DK8.7, I was able to
>>>> see the thumbnail of the xcf file, but in DK8.8, if I modify the 
>>>> file, I
>>>> don't see the thmbnail any more , just the file type (XCF).
>>>> Any idea?
>>>>
>>>> I'm on Win11
>>>>
>>>> regards
>>>> Frederic
>>>>
>>>>
>>
>